Fuse



July 4, 1933. D; WOODBERRY FUSE Fil'ed Sept. 20. 1926 Zjmwntoz U -L -WmmdherrH Patented July. 4, 1933 ms STATE DAVID WOODBERRY, or BALTIMORE,- MARsLA'uD, essreuon TO SECRETARY OF WAR on THE UNITED STATES or AMERICA y 1 r ruse Application filed September 20, 1926. seria No. 136.662.

eaau r'nn 1mm; run ear or Manon 3, 1883, as ensunnnarnn. 30.19%;1370 0. e. 757

The invention described herein may be manufactured and used by or for the Government for governmental purposes Without the payment to me of any royalty thereon.

The subject of this invention is a fuse especially designed as a nose fuse for bombs but I not restricted thereto; 7

In carrying out bombing operations the nature and character of the target together with the object sought controls the type of fuse to be employed. Because of the difierent actions vhichmust be provided for, it is obviously ofconsiderable convenience and advantage in fabrication and'distribution to combine in a single fuse elements which without adjustment Willmeet varying conditions;

According to the present invention'the fuse is provided with a plurality of powder trains adapted to produce instantaneous and delay action while the functioning of the igniting elementsis governed by the nature and degree of impact. On light impact at low velocity the delay train will :control while on heavy impact the fuse will be instantaneously set off.

With these and other objects in view which will appear asthe description proceeds, my invention resides in the novel arrangement and combination of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed maybe made within thescope of what is claimed without departing from the spirit of the invention.

A practical embodiment of the invention is illustrated in the accompanying drawlng wherein Fig. 1 is a longitudinal sectional view of a fuse embodying the principles of the invention and shown in unarmed position;

Fig. 2 is a view in elevation and partly 1n section at right angles to Fig. 1; and

Fig. 3 is a sectional View on the line 33 of Fig. 1.

Referring to the drawing by numerals of reference:

The fuse comprises a cylindrical casing or is a fuse head 9 spaced from the block 6 and detachably secured as by a threaded connect1on 10- which is capable of being stripped 'whenthe head is driven in. The fuse head is auxil arlysupported by a resistance ring 11 interposed'between the flange 9a of-the fuse y head and the rim of the body and adapted to be crushed on heavy impact while the threaded connection is being broken. The fuse head is provided in its under face and OK center. with a fixedfiring pin 12 positioned directly over a primer 13 in the block which communicates through thepassage 1 4; with a relay charge 15;.p'0sition'ed axially of the fuse.

The fuse headis centrally bored to "receive the stem 16 of'a pressure plate '17 which is held, when armed and during: arming, in spaced relation with respect't'o the block 6 bymeans of a spring 18 .which is ofsufiicient strength to overcomethe airpressure encoun teredduring flight. The stem 16 is provided with a firing pin 19 positioned directly above the delay train 20 axially of the block 6, and the pin is normally'held from contact with the primer of said train when the fuse is unarmed bya vane unit 21 which when connected by a threaded spindle 22 to the pressure plate, is in or near engagement with the flange 9a of the fuse head whereby its further inward movement is prevented. The pressure plate 17 is held against'rotation and against movement away from the fuse head during unthreading of the vane unit by means of a pin 23 carried by the firing pin 19 and extending into a longitudinal slot 24: in the fuse head.

Mounted for slidable movement in a passage 6a in the block perpendicularly to the axis of thefuse is a cylindrical bolt 25 containing a detonating charge 26. The bolt is normally held in unarmed position by means of a rod 27 passing through the fuse head- PATENT-50 m rotation in the customary manner by means plunger 29; V r

The main unit 21 is normally held against ofa pin '30 passing throughears iil and-32 respectively on the vane unit and fuse head 7 and replaceable by the release vwire of-the; standard launching mechanism carried by an airplane. I Upon light impact when the bomb strikes a yielding surface at a low velocity, the press sure plate will be forced inwardly until the firing pin carried thereby sets off the delay 7 train which communicates ignition to the relay charge 15. countered theresistance ring 11 is crushed and the fuse head is" driven in stripping the threads 10. Both the firing pins 12 and 19 will function under these'conditions but the primer 13 will communicate ignition instantaneously to the relay charge. A

In case a light impact is first obtained and a heavy impact occurs before the expiration of the vset delay instantaneous action will result. I v

I claim: v i V 1. A nose fuse for bombs including a body,

a delay and an instantaneous powder train in the body, the delay train arranged axially of the body, a fuse head including a fixed firing pin positioned above the instantaneous train and having a threaded connection with .the body adapted to be stripped on heavy impact, a resistance ring interposed between the head and body and adapted to be crushed on heavy impact, a pressureplate having a stem disposed in the fuse head and mounted for longitudinal movement with respect thereto, a firing pin on the stem, and a vane assembly normally holding the plate in unarmed position and unthreadable therefrom during flight to arm the plate.

2. A nose fuse for bombs including a body, a delay and an instantaneous powder train If a heavy impact is en-- gitudinal movement with respect thereto, a firing'pin on the stem and a vane assembly normally holding the plate in unarmed position and unthrcadable therefrom during flight to arm the plate. 7

3. A nose fuse for bombs including a body,

a; delay andan instantaneous powder train in the body, .a fuse head including a fixed firing pin positioned above the instantaneous train, saidhead arranged for longitudinal movement on heavy impact only, a firing pin member carried by the fuse head and arranged for longitudinal movement on light impact, a vane assembly normally holding the lightrimpact firing pin member in unarmedposition and unthreadable therefrom (luring flight to arm said member.

' 4. A fuse including a body, a fuse head provided with a firing pin and having a connection with the body adapted to be stripped on' heavy impact, a resistance ring interposed between the head and body and adapted to be crushed on heavy impact and a light impact firing pin member carried by the fuse.

' 5. A fuseincluding a body, an axial delay train in the'body, an instantaneous train disposed radially with respect to said axial train and means movable in the same direction for igniting said trains respectively on light and heavy impact.

6. A fuse, including a body, a fuse head frangibly. connected to the body and adapted to be disconnected therefrom on heavy impact anda light impact member overlying the fuse head and having a portion extending therethrough.

DAVID L'. VVOODBERRY. 

